$\int_3^7\frac{x}{x^2+6x+13}dx$
$\int\frac{2x+1}{\left(x^2+2\right)}dx$
$-6\sin\left(x\right)+3=0$
$e^x\left(ydx+dy\right)=0$
$-6.03-10$
$+58-9+2\left(-25\right)$
$x^2-14x+99$
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